Male Repro Physiology II Flashcards
Which substances affect sperm motility and how do their concentrations change along the epididymus?
1) cAMP -> increases motility -> increases along epididymus
2) Ca -> increases motility -> drops at tail to delay motility
3) Bicarb and B-defensins
Which type of parasympathetic innervation initiates erection and which substance initiates erection?
1) NANC = Non-adrenergic/Non-cholinergic
2) NO
Describe how sperm moves during erection
1) Sensory stimuli
2) Hypothalamus
3) Oxytocin released from posterior pituitary
4) Oxytocin induces smooth muscle contractions that move sperm through epididymus/ductus defrens
List the 5 substances contributed by accessory sex glands during emission
1) Fructose -> fuel for sperm
2) Ovulation Induction Factor -> stimulates LH -> ovulation
3) Substances that induce Female Immune Tolerance
4) Fluid for volume (esp. pig)
5) +/- Copulation Plug (rodents)
Describe the passage of neutrophils into the uterus following mating
- Peak 6-12 hours
- Persist for 24-48 hours
Rapid Transport Phase
- Sperm that enter oviduct immediately
- Rarely contribute to fertilization b/c skip capacitation
Sustained Phase
- Sperm sequestered in isthmus
- Undergo capacitation
- Released gradually
How does the female reproductive tract move sperm?
1) Uterine contractions induced by estradiol
2) Fluid secreted by the female reproductive tract
3) Prostaglandins in semen promote motility
When does the transition from linear to hyper-activated motility occur?
Capacitation
Which 3 factors damage the acrosome prematurely?
1) Osmotic pressure
2) Temp change
3) pH change
The vomeronasal organ is innervated by CN #
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